Duplicating device for letters and the like



G. H. SCULTHORP.

DUPLICATING DEVICE FOR LETTERS AND THE LIKE.

APPLICATION FILED JULY 8,1918.

1,334, 1-75. Patented Mar.16,1920.

GEORGE HERBERT SGULTHORP, OF -BALHAM, LONDON, ENGLAND.

DUPLICATING DEVICE FOR LETTERS AND THE LIKE.

Specification of Letters .Batent. Patented lVIar. 16, 1920.

' Application filed m 8, 1918. Serial No. 243,994.

To all whom it may concern:

' Be it known that "I, Gnonon HERBERT SoUL'rHonr, a subject of the King of Great Britain and Ireland, residing at 12 Nightingale Square, Balham, London, S. W., England, have invented new and useful Improvements in Duplicating Devices for Letters and the like, of which the following is a specification.

' This invention relates to that type of duplicating device intended to be operated by hand, and which comprises a segmental perforated plate having on its convex side a sheet of ink absorbing material, a handle being provided whereby the device can be used in connection with a stencil sheet.

According to the present invention the ends of the segmental plate are provided with means for detachably securing the sheet of ink absorbing material together with the stencil sheets. 0 my invention is the provision upon the side of the segmental plate of an adjustable pointer adapted to indicate from above the position of the stenciled matter.

In carrying out my inventionl employ a curved plate uponthe concave sideof which at each extremity I attach the ends of a cross bar to act as a handle to rock the said curved plate upon a given regular and preferably fiat surface from one end to the other of the curved plate. This late is provided with a number of per orations to allow a sufiicient amount of ink deposited upon its concave side to pass'through the perforations to the convex side upon which is placed a linen sheet to absorb the ink. The curved plate is provided with two or more projections at one or both ends of the same upon; which the linen sheet referred to is hooked or otherwise secured and these projections or hooks also act to secure thereon the wax sheets by passing through apertures in the same. These wax sheets are perforated or so treated that the ink deposited upon the linen sheet may pass through the stencil where it has been perforated to the paper upon which'the typed or other configurations are required to be transferred;

The curvedperforated plate is preferably made of thin metal either enameled or plated or otherwise treated to obtain an even surface which also enables it to be easily cleaned.

In connection with my improved dupli- Another feature of cator I may employ an indicator that may be easily moved and temporarily fixed in a required position to enable the duplicating device to be placed and used in such a manner that the duplicated matter may be transferred to the paper each time so as to register in the required position. This may be carried out by arranging a sliding piece upon one edge of the curved plate in such a manner that it can be easily moved upon this edge and secured by a spring or screw, and it is preferably arranged with a finger or pointer so as to indicate accurately the position in which it is required to locate the du licated matter.

11 order that my invention may be more readily understood I will now refer to the drawing accompanying this specification in which Figure 1 is a perspective view illus trating the same in a convenient form.

Fig. 2 is a detail vertical longitudinal section through one end of the device embodying my invention.

Referring to the drawing, A represents the curved segmental perforated plate, and B the handle connecting the ends of same in conjunction with wing pieces E. These may be of metal and the handle B of wood.

0 are the pins or studs arranged to carry the ink absorbing material F and punctured stencil G. These may be formed like hooks or any other shape of projection. D is the indicator referred to as sliding upon one edge of'the' curved plate and is shown pro vided with-a V-shaped downward finger or pointer for accurate registration, a screw pin or stud tightening it against the flange of the curved plate when required.

In using my duplicating device it is only necessary to ink sufliciently the absorbent material F which is hooked on the convex side of the perforated se entalplate G by the pins or studs C an upon this is then placed and also hooked on to the pins or studs the prepared stencil. The latter is conveniently affixed at one end only, the other being free. The ink can also be ap-t plied to the absorbent material F by brush ing the ink upon the concave side of the curved plate A, when the ink will penetrate to it through the perforations. My appliance may then be used by grasping the handle B and rocking the same so that the required convex surface of the stencil may be brought into contact with the paper from one end of the device to the other thereby printing upon the paper through the stencil.

By this means a large number of copies can be obtained from the stencil in much the same way as is now employed from a rotating drum and my device is not only much cheaper in construction but is much more readily kept clean and consequently able to do better Work.

claim:

1. In a duplicating device of the kind specified, the combination of a curved perforated plate, a handle located between the ends of same, an adjustable indicator upon the edge of said plate, and pins or rojections upon the ends of such plate or the purpose or purposes above mentioned.

In a duplicating device of the kind specified, the combination of a curved perforated plate, a handle located between the ends of same, wing pieces thereon to which pins or projections, and a said handle is attached, pins or projections upon the ends of said curved plate, a sheet of absorbent material held upon the convex face of the latter by said pins or projections, and a stencil sheet held at one end by the same pins or projections, the whole sub stantially as specified.

3. In a duplicating device of the kind specified, the combination of a curved perforated plate, a handle located between the ends of same, wing pieces thereon to which said handle is attached, pins or projections upon the ends of said curved plate, an adjustable indicator upon the edge of said plate, a sheet of absorbent material held upon the convex face of the latter by said stencil sheet held at one end by the same pins or rojections', the whole substantially as speci ed.

GEORGE HERBERT SOULTHORP. 

